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The workers are trying to ________ what’s wrong with the machine.
A.look forB.care forC.find outD.take out
C

试题分析:句意:工人们正在努力地查明机器出了什么毛病。look for 寻找;care for 关心;find out 查明,发现;take out 拿出。根据句意可知,工人们正在查明机器的毛病。故选C。
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